The wheelset’s 23mm internal width is perfect for running wider tubeless tires at reduced air pressure. That is a vital component of Total System Efficiency™, or TSE™, an approach to speed on ever-changing roads and riding conditions. Specifically, TSE™ focuses on overcoming specific barriers to speed: wind resistance, gravity, rolling resistance, and vibration losses.

Zipp’s ABLC™ Sawtooth™ Technology uses an intricate dimpling pattern to improve aero efficiency. Zipp’s use of hookless (straight side) rims in the 404 Firecrest is integral to Making You Faster.

With hookless, the transition between the tire and the rim is more seamless and aero. Zipp’s hookless rims have more efficient resin distribution, which means lighter, stronger wheels. At the center of the 404 Firecrest Tubeless Disc-brake is a versatile and durable new hubset, the German-engineered ZR1 DB. If you had to choose just one wheel for road riding and racing, the 404 Firecrest Tubeless Disc brake is a savvy and speedy choice.

Zipp now offers a Lifetime Warranty on Zipp Wheels, Rims & BSS for product defects plus a Lifetime Impact & Damage replacement policy which covers all damage while riding.

Features
Versatile aero wheelset for the modern road bike with tubeless and hookless rim profile*
Optimized tire bed for easy tire installation
Wide 23mm rim profile creates a better tire interface to be fast on or off the road - Optimised for 25mm Tyres
New ZR1 DB hub is engineered in Germany with better seal design for improved durability and quicker response with 66 points of engagement
Ships with 12mm front and rear end caps
Center locking rotor interface. Lockring is included with the wheels
XDR™ or SRAM/Shimano driver bodies
Campagnolo driver body sold separately
Lifetime warranty

* To be used with approved Hookless compatible tyres only